Final necropsy (animal autopsy) results for the Milwaukee County Zoo’s male snow leopard, Sossy, have been concluded. The 1-year-old feline died unexpectedly June 5.

Final pathology findings reveal Sossy had moderate to severe hydrocephalus, or excessive accumulation of fluid on the brain. The fluid is cerebrospinal fluid – a clear liquid that surrounds the brain and spinal cord. It is likely he was born with this neurological condition. It’s suspected Sossy may have had a seizure caused by the hydrocephalus which would have compromised his ability to navigate his exhibit. Veterinary personnel believe drowning was a secondary cause of death.